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Self-assembly of dandelion-like hydroxyapatite nanostructures via hydrothermal method

Lak, A ; Sharif University of Technology | 2008

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  1. Type of Document: Article
  2. DOI: 10.1111/j.1551-2916.2008.02600.x
  3. Publisher: 2008
  4. Abstract:
  5. Self-assembled dandelion-like hydroxyapatite (HAp) nanostructures were successfully synthesized via a mild template-free hydrothermal process, using ethylenediaminetetraacetic acid (EDTA) as the surfactant. The obtained dandelion-like HAp nanostructures were between 5 and 8 μm in diameter and were composed of radially oriented nanorods with an average diameter of about 200 nm. The X-ray diffraction analysis and Fourier transform infrared spectroscopy were used to characterize the crystalline phase and purity of the synthesized nanostructures. The Brunauer-Emmett-Teller surface area of the dandelion-like nanostructures was measured to be about 39 m2/g. The results of thermal analysis revealed that dandelion-like HAp nanostructures have appropriate thermal stability up to 1200°C. Scanning electron microscopy and transmission electron microscopy analyses showed that EDTA plays an important role in obtaining the dandelion-like morphology, because without it, only monodispersed HAp nanoparticles with an average diameter of about 125 nm were formed. The mechanism for the formation of dandelion-like HAp nanostructures was suggested based on the radial self-assembly of Ca-EDTA molecular complexes. © 2008 The American Ceramic Society
  6. Keywords:
  7. Acids ; Apatite ; Fourier transform infrared spectroscopy ; Fourier transforms ; Hydroxyapatite ; Infrared spectroscopy ; Nanorods ; Nanostructured materials ; Self assembly ; Spectroscopic analysis ; Surface active agents ; X ray diffraction analysis ; Average diameter ; Brunauer-Emmett-Teller surface area ; Crystalline phase ; Diffraction analysis ; Ethylene diamine tetra acetic acid ; Fourier Transform Infrared ; Hydrothermal methods ; Hydrothermal processing ; Self-assembled ; Synthesized nanostructures ; Template-free ; Nanostructures
  8. Source: Journal of the American Ceramic Society ; Volume 91, Issue 10 , 2008 , Pages 3292-3297 ; 00027820 (ISSN)
  9. URL: https://ceramics.onlinelibrary.wiley.com/doi/abs/10.1111/j.1551-2916.2008.02600.x